Investigation of Scintrex CG-6 Gravimeters in the Gravity Meter Calibration System Hannover

verfasst von
Ludger Timmen, Christian Rothleitner, Marvin Reich, Stephan Schröder, Matthias Cieslack
Abstract

A reliable evaluation of four Scintrex CG-6 gravimeters was done with respect to the stability of the calibration, measurement uncertainty, repeatability, and daily drift behaviour. An uncertainty on the 10 nm/s2 level for adjusted g-results is striven for. Measurements were performed on the Vertical Gravimeter Calibration Line Hannover (VGCH, 192 μm/s2 range, 20-storey building, 10 μm/s2 interval, 2 · 10−4 expanded uncertainty of the scale). The achieved standard deviations of the adjusted calibration factors are in the order of 2 to 6 · 10−5, and the maximum variations between two calibration results for a single instrument varied between 2 to 7 · 10−4. Therefore, the stability of the scale factor (calibration) of a CG-6 instrument has to be controlled by the user before and after the microgravimetric survey. The transportation drift over some hours or a working day shows partly short-term variations with an impact of up to 100 nm/s2 which can only be identified and controlled by sufficient repeated observations on same points. The manufacturer Scintrex Ltd. solved the problematic nature of an instrumental air pressure effect but a test especially for older CG gravimeters is still recommended. Overall, the CG-6 gravimeters meet fully the expectations.

Organisationseinheit(en)
Institut für Erdmessung
QuantumFrontiers
Externe Organisation(en)
Physikalisch-Technische Bundesanstalt (PTB)
Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum (GFZ)
Landesamt für Vermessung und Geobasisinformation
Typ
Artikel
Journal
AVN Allgemeine Vermessungs-Nachrichten
Band
127
Seiten
155-162
Anzahl der Seiten
8
ISSN
0002-5968
Publikationsdatum
2020
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Geografie, Planung und Entwicklung, Tief- und Ingenieurbau, Erdkunde und Planetologie (sonstige)
Elektronische Version(en)
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5003300 (Zugang: Geschlossen)
 

Details im Forschungsportal „Research@Leibniz University“